README.md

Description

Free looping drum machine. Record unquantized drums on three different channels.
The first recording sets the loop length. The recording can be launched by a trigger or encoder press.
After the first loop, turn record back on to record more drums. There is an end of cycle output available to sync other gear.
Try different trigger inputs! Drum pads, switches, and sequencers are all good ideas!

Controls

Control	Description	Comment
Ctrl 1	Kick Decay Time
Ctrl 2	Kick Pitch
Ctrl 3	Snare Decay Time
Ctrl 4	Hat Decay Time
Encoder Turn	Select Channel
Encoder Press	Record	The first loop sets the length.
Encoder long press	Reset looper
Gate In 1	Trigger to record	Starts recording in ready mode
Gate Out	End of Cycle
Audio Out 1	Kick Out
Audio Out 2	Snare Out
Audio Out 3	Hat Out
Audio Out 4	Mix Out

Diagram

Code Snippet

for (size_t i = 0; i < size; i ++){
    float outs[3]; 

    osc.SetFreq(kckPitchEnv.Process());
    osc.SetAmp(volEnvs[0].Process());
    outs[0] = osc.Process();

    float noise_out = noise.Process();
    outs[1] = noise_out * volEnvs[1].Process();

    outs[2]= noise_out * volEnvs[2].Process();

    float mix = 0.f;
    float mixLevels[] = {.5f, .1f, .05f};

    for (size_t chn = 0; chn < 3; chn++)
    {
        out[chn][i] = outs[chn];
        mix += mixLevels[chn] * outs[chn];
    }

    out[3][i] = mix;
}